Broadening the reflection bandwidth of polymer-stabilized cholesteric liquid crystal via a reactive surface coating layer

Broadening the reflection bandwidth of polymer-stabilized cholesteric liquid crystal via a reactive surface coating layer

We report a method of broadening the reflection bandwidth of polymer-stabilized cholesteric liquid crystal (PSCLC). The top substrate was consecutively coated with a polyimide (PI) and a reactive mesogen (RM) layer, while the bottom substrate was coated with only PI. We exposed the top substrate wit...

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Veröffentlicht in:Applied optics (2004) 2017-07, Vol.56 (20), p.5731-5735
Hauptverfasser: Kim, Jongyoon, Kim, Hyungmin, Kim, Seongil, Choi, Suseok, Jang, Wonbong, Kim, Jinwuk, Lee, Ji-Hoon
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container_end_page 5735
container_issue 20
container_start_page 5731
container_title Applied optics (2004)
container_volume 56
creator Kim, Jongyoon
Kim, Hyungmin
Kim, Seongil
Choi, Suseok
Jang, Wonbong
Kim, Jinwuk
Lee, Ji-Hoon
description We report a method of broadening the reflection bandwidth of polymer-stabilized cholesteric liquid crystal (PSCLC). The top substrate was consecutively coated with a polyimide (PI) and a reactive mesogen (RM) layer, while the bottom substrate was coated with only PI. We exposed the top substrate with the RM coating to UV light. The reflection bandwidth of the PSCLC samples where the top substrate was over-coated with RM was significantly broader than the samples where both substrates were coated with PI. In addition to the effect of the UV intensity gradient, the RM-coated top substrate has a chemical affinity to bulk RM, promoting formation of the pitch gradient and broadening the reflection bandwidth in the sample.
doi_str_mv 10.1364/AO.56.005731
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title Broadening the reflection bandwidth of polymer-stabilized cholesteric liquid crystal via a reactive surface coating layer
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